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  <title>从文件指针中读取字符</title>

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</div><hr /><div id="function.fgetc" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">fgetc</h1>
  <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">fgetc</span> &mdash; <span class="dc-title">从文件指针中读取字符</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.fgetc-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="type">string</span> <span class="methodname"><strong>fgetc</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$handle</code></span>
   )</div>

  <p class="para rdfs-comment">
   从文件句柄中获取一个字符。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.fgetc-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">handle</code></em></dt>

     <dd>

      <p class="para">文件指针必须是有效的，必须指向由
<span class="function"><a href="function.fopen.html" class="function">fopen()</a></span> 或 <span class="function"><a href="function.fsockopen.html" class="function">fsockopen()</a></span> 成功打开的文件(并还未由 <span class="function"><a href="function.fclose.html" class="function">fclose()</a></span> 关闭)。</p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.fgetc-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
    返回一个包含有一个字符的字符串，该字符从 <em><code class="parameter">handle</code></em> 指向的文件中得到。
   碰到 EOF 则返回 <strong><code>FALSE</code></strong>。
  </p>
  <div class="warning"><strong class="warning">Warning</strong><p class="simpara">此函数可能返回布尔值
<strong><code>FALSE</code></strong>，但也可能返回等同于 <strong><code>FALSE</code></strong> 的非布尔值。请阅读 <a href="language.types.boolean.html" class="link">布尔类型</a>章节以获取更多信息。应使用
<a href="language.operators.comparison.html" class="link">===
运算符</a>来测试此函数的返回值。</p></div>
 </div>


 <div class="refsect1 examples" id="refsect1-function.fgetc-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2295">
    <p><strong>Example #1 一个 <span class="function"><strong>fgetc()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$fp&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">'r'</span><span style="color: #007700">);<br />if&nbsp;(!</span><span style="color: #0000BB">$fp</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">'Could&nbsp;not&nbsp;open&nbsp;file&nbsp;somefile.txt'</span><span style="color: #007700">;<br />}<br />while&nbsp;(</span><span style="color: #0000BB">false&nbsp;</span><span style="color: #007700">!==&nbsp;(</span><span style="color: #0000BB">$char&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">fgetc</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">)))&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"</span><span style="color: #0000BB">$char</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.fgetc-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数可安全用于二进制对象。</span></p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.fgetc-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.fread.html" class="function" rel="rdfs-seeAlso">fread()</a> - 读取文件（可安全用于二进制文件）</span></li>
    <li class="member"><span class="function"><a href="function.fopen.html" class="function" rel="rdfs-seeAlso">fopen()</a> - 打开文件或者 URL</span></li>
    <li class="member"><span class="function"><a href="function.popen.html" class="function" rel="rdfs-seeAlso">popen()</a> - 打开进程文件指针</span></li>
    <li class="member"><span class="function"><a href="function.fsockopen.html" class="function" rel="rdfs-seeAlso">fsockopen()</a> - Open Internet or Unix domain socket connection</span></li>
    <li class="member"><span class="function"><a href="function.fgets.html" class="function" rel="rdfs-seeAlso">fgets()</a> - 从文件指针中读取一行</span></li>
   </ul>
  </p>
 </div>

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